While struggling to make friends after his parents’ divorce, Koyomi Takasaki meets Kazune Takigawa, but apparently, they already have. Kazune reveals that she’s from World Line 85, an alternate universe in which she and Koyomi are lovers. But in a reality where moving between dimensions is natural, could Koyomi be the one from another world?
but when all is said and done, 
I was happy to get to talk with her,
aber irgendwie hat es mir
gefallen, mit ihr zu sprechen,
pero me gustaba poder hablar con ella,
pero me gustaba poder hablar con ella,
ma in fin dei conti ero contento
 di poter parlare con lei
apesar disso, eu ficava feliz
de poder conversar com ela,
но, что ни говори,
я был рад проводить время вдвоём.